By how much does psyllium husk lower Hemoglobin A1c (HbA1c) levels in Type 2 Diabetes Mellitus (T2DM) patients?

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Last updated: June 22, 2025View editorial policy

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From the Research

Psyllium husk supplementation typically lowers Hemoglobin A1c (HbA1c) levels in Type 2 Diabetes Mellitus patients by approximately 0.97% when taken regularly, as shown in a meta-analysis of 35 randomized, controlled, clinical studies 1. The recommended dosage is 10-15 grams daily, divided into 2-3 doses, taken with at least 8 ounces of water before meals. For optimal results, patients should continue this regimen for at least 8-12 weeks, as glycemic improvements develop gradually. Psyllium works by forming a viscous gel in the digestive tract that slows carbohydrate absorption, reducing post-meal blood glucose spikes. This soluble fiber also improves insulin sensitivity and may help with weight management by promoting satiety. It's essential to start with a lower dose (around 5 grams daily) and gradually increase to avoid gastrointestinal discomfort. Patients should maintain adequate hydration when taking psyllium to prevent constipation or esophageal obstruction. While psyllium can be a helpful adjunct therapy, it should complement rather than replace conventional diabetes medications and lifestyle modifications. Some studies have shown that psyllium can also reduce total and LDL cholesterol, as well as uric acid levels, which can help lower the risk of coronary heart disease 2. However, the US Food and Drug Administration (FDA) has concluded that there is very little scientific evidence to support the claim that psyllium husk reduces the risk of type 2 diabetes 3. Despite this, psyllium has been shown to reduce postprandial glucose and insulin concentrations in patients with non-insulin-dependent diabetes 4. Overall, the most recent and highest quality study suggests that psyllium husk can be a useful adjunct therapy for lowering HbA1c levels in Type 2 Diabetes Mellitus patients 1.

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